Thickness-related synchronous increase in strength and ductility of ultrafine-grained pure aluminum sheets

IMR OpenIR

	Thickness-related synchronous increase in strength and ductility of ultrafine-grained pure aluminum sheets
	Yan Ying 1; Zhang Guoqiang 1; Chen Lijia 1; Li Xiaowu 1
	2019
发表期刊	INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
ISSN	1674-4799
卷号	26 期号:11 页码:1450-1456
摘要	To explore the specimen size effect of mechanical behavior of ultrafine-grained (UFG) materials with different structures, UFG Al sheets processed by equal channel angular pressing (ECAP) were selected as target materials and the dependency of tensile behavior on sheet thickness (t) was systematically investigated. The strength and ductility of ECAPed UFG Al sheets were improved synchronously as t increased from 0.2 to 0.7 mm, and then no apparent change occurred when t reached to 0.7 and 1.0 mm. The corresponding microstructure evolved from dislocation networks in equiaxed grains into the walls and subgrains and finally into the dominated cells in elongated grains or subgrains. Meanwhile, dense shear lines (SLs) and shear bands (SBs) were clearly observed and microvoids and cracks were initiated along SBs with the increase of t. These observations indicated that the plastic deformation of UFG Al sheets was jointly controlled by shear banding, dislocation sliding, and grain-boundary sliding. Furthermore, the propagation of SBs became difficult as t increased. Finally, the obtained results were discussed and compared with those of annealed UFG Al and UFG Cu.
关键词	STACKING-FAULT ENERGIES CU-MN ALLOYS DEFORMATION-BEHAVIOR SPECIMEN DIMENSIONS TENSILE BEHAVIOR MICRO-EXTRUSION STRAIN-RATE SIZE OPTIMIZATION TEMPERATURE ultrafine-grained pure Al specimen size effect strength ductility
收录类别	CSCD
语种	英语
资助项目	[National Natural Science Foundation of China] ; [Open Foundation of Key Laboratory for Anisotropy and Texture of Materials, Ministry of Education, Northeastern University, China]
CSCD记录号	CSCD:6618970
引用统计	被引频次：2[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/149421
专题	中国科学院金属研究所
作者单位	1.中国科学院金属研究所 2.上海市地震局
推荐引用方式 GB/T 7714	Yan Ying,Zhang Guoqiang,Chen Lijia,et al. Thickness-related synchronous increase in strength and ductility of ultrafine-grained pure aluminum sheets[J]. INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS,2019,26(11):1450-1456.
APA	Yan Ying,Zhang Guoqiang,Chen Lijia,&Li Xiaowu.(2019).Thickness-related synchronous increase in strength and ductility of ultrafine-grained pure aluminum sheets.INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS,26(11),1450-1456.
MLA	Yan Ying,et al."Thickness-related synchronous increase in strength and ductility of ultrafine-grained pure aluminum sheets".INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS 26.11(2019):1450-1456.